Military Clock Finished with TDD

src/main/java/io/zipcoder/Problem6.java

@@ -1,4 +1,140 @@
 package io.zipcoder;
+import java.util.HashMap;
 
 public class Problem6 {
+
+    private HashMap<String, String> hours = new HashMap<String, String>();
+    private HashMap<String, String> minutes = new HashMap<String, String>();
+    private HashMap<String, String> multiplesOfTen = new HashMap<String, String>();
+    private String[] input = {};
+
+    public Problem6(){
+        populateHours();
+        populateMinutes();
+        populateMultiplesOfTen();
+    }
+
+    // Converts String input to Military Time result
+    public String convertToMilitaryTime(String input) {
+        this.input = splitTime(input);
+
+        if(inTheMorning(this.input)){
+            return getHourInMilitaryAM(this.input[0]) +
+                   " Hundred and " +
+                    getMinutesInMilitary(this.input[1]) +
+                   " Hours";
+        } else {
+            return getHourInMilitaryPM(this.input[0]) +
+                    " Hundred and " +
+                    getMinutesInMilitary(this.input[1]) +
+                    " Hours";
+        }
+    }
+
+    // Splits input into array // example: {10, 45, am}
+    protected String[] splitTime(String time){
+        String[] splitTimes = time.split(":");
+        String[] endSplitTime = {
+                                 splitTimes[0],
+                                 splitTimes[1].substring(0, 2),
+                                 time.substring(time.length() - 2)
+                                };
+        return endSplitTime;
+    }
+
+    // Checks if the input contains (am) - morning time
+    protected boolean inTheMorning(String[] testArray){
+        return (testArray[2].equalsIgnoreCase("am"));
+    }
+
+    // Checks what number the minutes starts with and feeds to getMinutesInMilitary
+    private String minuteNumberStartsWith(String[] timeArray){
+        String firstMinuteNumber = "";
+        for(int i = 0; i < 6; i++){
+            if(timeArray[1].substring(0, 1).equals(String.valueOf(i))){
+                firstMinuteNumber += String.valueOf(i + "0");
+                break;
+            }
+        }
+        return firstMinuteNumber;
+    }
+
+    protected String getHourInMilitaryAM(String hour){
+        if(Integer.parseInt(hour) == 12){
+            return hours.get("0");
+        } else {
+            return hours.get(hour);
+        }
+    }
+
+    protected String getHourInMilitaryPM(String hour){
+        Integer pmHour = Integer.parseInt(hour) + 12;
+        if(Integer.parseInt(hour) == 12){
+            return hours.get("12");
+        } else {
+            return hours.get(String.valueOf(pmHour));
+        }
+    }
+
+    // Converts standard minutes to military minutes
+    protected String getMinutesInMilitary(String inputMinutes){
+
+        if (Integer.parseInt(inputMinutes.substring(0, 2)) < 10) {
+            return hours.get(inputMinutes.substring(inputMinutes.length() - 1));
+        } else if (Integer.parseInt(inputMinutes.substring(0, 2)) < 20){
+            return hours.get(inputMinutes);
+        } else if (Integer.parseInt(inputMinutes.substring(0, 2)) % 10 == 0) {
+            return multiplesOfTen.get(minuteNumberStartsWith(this.input));
+        } else {
+            return multiplesOfTen.get(minuteNumberStartsWith(this.input)) + " " +
+                   minutes.get(inputMinutes.substring(inputMinutes.length() - 1));
+        }
+    }
+
+    private void populateHours(){
+        hours.put("0", "Zero Zero");
+        hours.put("1", "Zero One");
+        hours.put("2", "Zero Two");
+        hours.put("3", "Zero Three");
+        hours.put("4", "Zero Four");
+        hours.put("5", "Zero Five");
+        hours.put("6", "Zero Six");
+        hours.put("7", "Zero Seven");
+        hours.put("8", "Zero Eight");
+        hours.put("9", "Zero Nine");
+        hours.put("10", "Ten");
+        hours.put("11", "Eleven");
+        hours.put("12", "Twelve");
+        hours.put("13", "Thirteen");
+        hours.put("14", "Fourteen");
+        hours.put("15", "Fifteen");
+        hours.put("16", "Sixteen");
+        hours.put("17", "Seventeen");
+        hours.put("18", "Eighteen");
+        hours.put("19", "Nineteen");
+        hours.put("20", "Twenty");
+        hours.put("21", "Twenty One");
+        hours.put("22", "Twenty Two");
+        hours.put("23", "Twenty Three");
+    }
+
+    private void populateMinutes(){
+        minutes.put("1", "One");
+        minutes.put("2", "Two");
+        minutes.put("3", "Three");
+        minutes.put("4", "Four");
+        minutes.put("5", "Five");
+        minutes.put("6", "Six");
+        minutes.put("7", "Seven");
+        minutes.put("8", "Eight");
+        minutes.put("9", "Nine");
+    }
+
+    private void populateMultiplesOfTen(){
+        multiplesOfTen.put("10", "Ten");
+        multiplesOfTen.put("20", "Twenty");
+        multiplesOfTen.put("30", "Thirty");
+        multiplesOfTen.put("40", "Forty");
+        multiplesOfTen.put("50", "Fifty");
+    }
 }

src/test/java/io/zipcoder/Problem6Test.java

@@ -1,4 +1,59 @@
 package io.zipcoder;
 
+
+import org.junit.Assert;
+import org.junit.Test;
+
 public class Problem6Test {
+
+    @Test
+    public void convertToMilitaryTimeAMTest(){
+        Problem6 problem6 = new Problem6();
+
+        String expected = "Eleven Hundred and Thirty Three Hours";
+        String actual = problem6.convertToMilitaryTime("11:33am");
+
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void convertToMilitaryTimePMTest(){
+        Problem6 problem6 = new Problem6();
+
+        String expected = "Twenty Three Hundred and Thirty Three Hours";
+        String actual = problem6.convertToMilitaryTime("11:33pm");
+
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void splitTimeTest(){
+        Problem6 problem6 = new Problem6();
+
+        String[] expected = {"10", "35", "pm"};
+        String[] actual = problem6.splitTime("10:35pm");
+
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void isItMorningTest(){
+        Problem6 problem6 = new Problem6();
+        String[] timeArray = {"10", "35", "am"};
+
+        boolean actual = problem6.inTheMorning(timeArray);
+
+        Assert.assertTrue(actual);
+    }
+
+    @Test
+    public void isItAfternoonTest(){
+        Problem6 problem6 = new Problem6();
+        String[] timeArray = {"10", "35", "pm"};
+
+        boolean actual = problem6.inTheMorning(timeArray);
+
+        Assert.assertFalse(actual);
+    }
+
 }